Modifying kernel parameters (Linux)

Before installing DB2 UDB, you may want to update your Linux kernel
parameters. DB2 UDB automatically raises the IPC limits where necessary. You
might still want to raise these limits further depending on your particular
needs.

Prerequisites

You must have root authority to modify kernel parameters.

Procedure

To update kernel parameters:

RedHat and SuSE

Systems using a 2.4.x series kernel have a default value for the message
queue parameter (msgmni), which allows only a few simultaneous connections to
DB2. Semaphore array parameters also have to be changed for DB2 to run
successfully. To check shared memory segment, semaphore array, and message queue
limits, issue the ipcs -l command.